Once Ashe has her Ultimate up, do not over extend as she can easily snipe you with it and set up her Jungler. Keep the lane warded and be prepared to dodge her Ultimate at a seconds notice.
Ashe doesn’t have any escape abilities or built in sustain. Use this to your advantage by poking her down frequently and then trying to all in her when she is lower.
To prevent Ashe from getting extra damage down on you in the early game, stand behind the minions so they block her damage for you.
Ashe is really immobile and squishy. Try to catch her out of position first and take her down as quickly as you can to win the fight.
Keep a constant eye on your champions movements in the mid and late game as Ashe will usually throw out her Ultimate “recklessly” in attempts to start the fight. Dodge it and then capitalise on the cooldown.
Be prepared to back away from an objective if Ashe uses her to scout vision. If your team is spotted, the enemy will try to contest the objective which may lead to your team throwing the game.
Ashe is much stronger in long skirmishes because it allows her to activate her in the trade. Do not go for extended trades against Ashe unless you can kill her.
Ashe is self reliant after level 6 and when her Ultimate is up because she can use it in a variety of ways. Try to abuse her when her Ultimate is on cooldown.
Once Ashe has completed Blade of the uined King she is going to dish out a lot more damage.